Door latch



Jan. 12 1926. V

J- E. M MULLEN DOOR LATCH Filed August '7, 1924 ATTORNEY.

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UNITED STATES 1,569,331 PATENT OFFICE.

JOHN E. MCMULLEN, OF COUNCIL BLUFFS, IOWA.

noon LATCH. r

Y Ap'plicationdlled August 7, 1924. Serial No. 730,780.

To all whom it may concern;

Be it known that I, J OHN E. MCMULLEN, a citizen ofthe United States, residing at Council Bluffs, 'in the'county of Fottawattamie and State of'Iowa, have invented a new and useful Improvement in Door Latches, of which the following is a specification. i Y

My invention relates to latches adapted to hold a door both 'open and closed; and the objects of-my improvement are, first, to provide a latch easily adapted to control the movement of opening and closing a door; second, to provide such a latch that will hold the door locked both in an open and closed position; and, third, to provide such a latch that will be simple in construction and operation.

I attain these ob'ects by the device and structure illustrate in the accompanying drawing, in which- 'Fi re 1;.is a side elevation of a doorwith latch attached; Fig. 2 is a cross section of a latch and latch lock; Fig. 3, is a lan of the door and attachment; Fig. 4 1s a side elevation of the latch catch; Fig. 5 is a front elevation of the latch catch; Fig. 6'is a side elevation of another form of the latch catch; Fig. 7 is a side elevation of the latch showing its operation through the door to the outside; Fig. 8 is a side elevation of a locking device; and Figure 9 is an end elevation of the locking device shown in Figure 8. v

Similar numerals refer to similar parts is used throughout the several views.

d is any ordinary door such as on barns or arages; j is the door frame.

This door is ingedat a; a brace b is pin-- ioned at 1.0; a latch rod p has an arm m adapted toturn in approximately 180 degrees on the side of the door (I; a second lever portion 1 of'the latch rod p and substantially arallel with the arm m engages the brace g at its extremity from its pivot at c, and at-the'point e in said brace 12. When the lever arm m of the latch rod 7 is turned to a position as to the rightagainst the door d, the lever n of the latch rod r draws the brace 12 against the pivot c to;

hold the door closed. By moving the lever arm m of the latch rod p in the opposite direction, as to the left of the door d, the door will be moved about its hinges a away from the pivot c to open. When the lever m has reached a position approximately 180 degrees, or to the face of the door against which the latch rod 9 is hinged, the lever m will assume a position parallel to the door and the brace b will extend from its pivot c to its engagement at a with the lever m and-will brace and hold open the door (i so long as the lever m remains parallel with the door 03. Catches f and f are adapted to catch and hold the lever on when turned towards the free end of the door and when turned in the opposite direction. When the'lever m is brought within the catch f towards the free end of the door d,

as shown-in Figures 8 and 9 is employed.

A catch 0 is pivoted in the support-r on the door. A 100 f" is provided to receive the catch 0 so tli at' when the door is shut the catch falls over the loop 7 when the handle .m is in the slot 6 as shown in Figure 1. To open the door t e lever m1 is raised, when it impinges against the catch E0 lifting it in .the loop f'f allowing the door to plpen freely. Catches f" and f' may be use in Figure 6 instead of a rotary form, as.

used in Figure 4; and a latch may be introduced through the door to lift the lever m .of the bar p to. operate the look. When it is desirable to lift the latch f from the outside, .a form of latch maybe used as in Figure 2.

While locks using braces to hold doors oppn and-shut. have been used Lheretofore, w at I' claim and desire to claim by Letters Patent is:

1. In a doorlatch a locking brace pinioned at a point remote'from' the door hinge on the door frame, a latch rod hinged on the door adapted to rotate through half a circle, a lever serve as a han e, and a second lever portion thereon engaging brace.

2. In a door latch, a locking brace pinioned at a oint on the door frame remote as shown the free end of said ortion thereon adapted to from the cor hinge, a latchrod. hinged adapted to rotate through half a .circle,'

catches to'hold the said lever portion of said latch rod in its rotation on the door,

and a catch to hold said door shut and adapted to vbe operated by said latch rod when lifting it out of its catches on the door. 7

3. In a door latch, a locking brace inioned at a point remote from the door hinge on the door frarne, a latch rod hinged on the door adapted to rotate throughhalf a circle, a lever portion thereon adapted to serve as a handle, a second lever portion thereon engaging the free end of said brace, catches adapted to engage and hold the end lever arm of said latch rod, and said latch rod having an end movement allowing the said latch rod to engage said catches and a one or more of said catches ada ted to be operated from the outside of sai door'and a pawl to lock the said catch against operation from the outside.

JOHN E. MOMULLEN. 

